Table 6.
Agreement statistics on both the “location and classification” of food retailers for the Locatus dataset.
| By Category | By Subcategory | TP * | FN | FP | Locatus Dataset | ||
|---|---|---|---|---|---|---|---|
| Sensitivity | PPV | Concordance | |||||
| Overall | 246 | 1 | 42 | 0.996 | 0.854 | 0.851 | |
| Urbanization | Urban | 207 | 1 | 37 | 0.995 | 0.848 | 0.845 |
| Rural | 39 | 0 | 5 | 1.000 | 0.886 | 0.886 | |
| Grocery stores | Supermarkets | 15 | 0 | 0 | 1.000 | 1.000 | 1.000 |
| Local product shops | - | - | - | - | - | - | |
| Fruit and vegetable stores | 2 | 0 | 0 | 1.000 | 1.000 | 1.000 | |
| Bakeries | 7 | 0 | 1 | 1.000 | 0.875 | 0.875 | |
| Animal product stores | 13 | 1 | 8 | 0.929 | 0.619 | 0.590 | |
| Natural product stores | 7 | 0 | 1 | 1.000 | 0.875 | 0.875 | |
| Convenience stores | 3 | 0 | 3 | 1.000 | 0.500 | 0.500 | |
| Confectionery stores | 7 | 0 | 0 | 1.000 | 1.000 | 1.000 | |
| Food outlets | Restaurants | 121 | 0 | 3 | 1.000 | 0.976 | 0.976 |
| Fast food restaurants | 27 | 0 | 4 | 1.000 | 0.871 | 0.871 | |
| Take away restaurants | 10 | 0 | 8 | 1.000 | 0.556 | 0.556 | |
| Cafés | 34 | 0 | 14 | 1.000 | 0.708 | 0.708 | |
TP, true positive; FN, false negative; FP, false positive; PPV, positive predictive value. * Number of stores correctly located and classified (246).